There is a memory leak in tasklist if filter auto-refresh is enabled.

In order to reproduce it just start tomcat distribution (https://camunda.org/release/camunda-bpm/tomcat/7.6/camunda-bpm-tomcat-7.6.0.zip) login into the tasklist app, select All Tasks filter (there should be some tasks in there) and leave the page open for several hours.

In a day one can go up to 1.5 GB, in two days the browser usually crashes. The attached screen-shot was taken after just 4 hours.

More details here: https://forum.camunda.org/t/forms-memory-leak/3243/3

Browsers tested:
FF 53.0 (32-bit)
Chrome Version 57.0.2987.133